I shouldn't be laughing so hard. No, but imagine Dean has a little girl and she's braiding Sam's hair and she says to him, "You're my favorite uncle" and he says, "I'm your only uncle." And then Dean just says "Shit, we forgot Adam!
No Samson did NOT get his power from his hair! He got his power from the Nazarite vow that he took which includes not cutting your hair. The power was given by God not his hair because that would be stupid.